Hi I hesitate to chime in as you guys seem to know more than me re Y 90 than me already. But 2 cents from the peanut gallery. I had liver cancer (3 tumors) 2 years ago. My local doctors insisted my only hope was a liver transplant. But it would be a race to get on the list and get one before the cancer spread outside of the liver which would disqualify me. So during the months of going through those hoops I had Y-90 procedures 2 times.
Both events were at a hospital and was there about 8 hrs, went home same day. It was not fun but not terrible.
The 2 doeses were successful as while they did not kill the cancer but they shrunk the tumors greatly. Which did prevent the cancer from spreading until I had a successful transplant in 2024. Don't know if any of this helps but the very best of luck.